这个公式语法有些复杂：在I调用内部，算术符号与它们通常的含义相同，所以，例如第一个I表示：2乘pi乘x，再除以365。
This formula syntax is a little tricky: inside the I calls, the arithmetic symbols have their usual meanings, so the first I , for example, means: 2 times PI times x, divided by 365.
微处理器执行代码指令进行算术运算，内部数据的传递以及与外部设备通信。
A microprocessor executes encoded instructions to perform arithmetic operations, internal data transfer, and communications with external devices.
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